Definition of optical double in English:

optical double

noun

Astronomy

A group of two stars which appear to constitute a double star due to their being in the same line of sight as seen from the earth, but are actually at different distances.
Example sentencesExamples
- The physical doubles (or binary stars) are much more numerous than the optical doubles.
- At first he figured that such pairs consisted of two stars vastly distant from each other but coincidentally lying along a single line of sight - a visual phenomenon we now call optical doubles.

noun

Astronomy

Two stars that are in the same line of sight as seen from the earth, but that may be at far different distances.
See also double star
Example sentencesExamples
- The physical doubles (or binary stars) are much more numerous than the optical doubles.
- At first he figured that such pairs consisted of two stars vastly distant from each other but coincidentally lying along a single line of sight - a visual phenomenon we now call optical doubles.

单词	optical double
释义	Definition of optical double in English: optical double noun Astronomy A group of two stars which appear to constitute a double star due to their being in the same line of sight as seen from the earth, but are actually at different distances. Example sentencesExamples The physical doubles (or binary stars) are much more numerous than the optical doubles. At first he figured that such pairs consisted of two stars vastly distant from each other but coincidentally lying along a single line of sight - a visual phenomenon we now call optical doubles. Definition of optical double in US English: optical double noun Astronomy Two stars that are in the same line of sight as seen from the earth, but that may be at far different distances. See also double star Example sentencesExamples The physical doubles (or binary stars) are much more numerous than the optical doubles. At first he figured that such pairs consisted of two stars vastly distant from each other but coincidentally lying along a single line of sight - a visual phenomenon we now call optical doubles.
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